Carolyn Ruppel, PhD

Science and Products

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  December 23, 2020

  U.S. Atlantic Margin Gas Hydrates and Methane Seeps

  The U.S. Atlantic continental margin was one of the first locations where researchers recognized bottom simulating reflections, seismic features that are generally interpreted as marking the base of the gas hydrate stability zone in marine sediments. Geophysical cruises and ocean drilling in the 1990s provided insight into the Blake Ridge gas hydrate province. In the past decade, hundreds of...

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  Woods Hole Coastal and Marine Science Center

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  December 23, 2020

  U.S. Atlantic Margin Gas Hydrates and Methane Seeps

  The U.S. Atlantic continental margin was one of the first locations where researchers recognized bottom simulating reflections, seismic features that are generally interpreted as marking the base of the gas hydrate stability zone in marine sediments. Geophysical cruises and ocean drilling in the 1990s provided insight into the Blake Ridge gas hydrate province. In the past decade, hundreds of...

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  December 18, 2020

  Arctic Methane Dynamics

  The Arctic Ocean and circum-Arctic land masses are warming more rapidly than other locations on Earth, a phenomenon called the Arctic Amplification Effect. A critical question is how this warming will affect temperature-sensitive gas hydrate deposits and methane dynamics at high latitudes. Research focuses on the contemporary distribution of gas hydrates in marine and permafrost settings; the...

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  Woods Hole Coastal and Marine Science Center

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  December 18, 2020

  Arctic Methane Dynamics

  The Arctic Ocean and circum-Arctic land masses are warming more rapidly than other locations on Earth, a phenomenon called the Arctic Amplification Effect. A critical question is how this warming will affect temperature-sensitive gas hydrate deposits and methane dynamics at high latitudes. Research focuses on the contemporary distribution of gas hydrates in marine and permafrost settings; the...

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  June 19, 2019

  Seeking the Seeps

  From June 12 to July 3, 2019, the USGS sailed onboard Schmidt Ocean Institute’s R/V Falkor with several other partners, seeking methane seeps along the seafloor of several underwater canyons off the coast of Oregon and Washington. On this cruise, USGS scientists will seek to understand how much methane is coming out of these seeps, how it travels through the water column, and its ultimate fate in...

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  Ecosystems Mission Area, Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Wetland and Aquatic Research Center , Woods Hole Coastal and Marine Science Center, Communications and Publishing

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  June 19, 2019

  Seeking the Seeps

  From June 12 to July 3, 2019, the USGS sailed onboard Schmidt Ocean Institute’s R/V Falkor with several other partners, seeking methane seeps along the seafloor of several underwater canyons off the coast of Oregon and Washington. On this cruise, USGS scientists will seek to understand how much methane is coming out of these seeps, how it travels through the water column, and its ultimate fate in...

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  October 15, 2018

  U.S. Geological Survey Gas Hydrates Project

  The USGS Gas Hydrates Project has been making contributions to advance understanding of US and international gas hydrates science for at least three decades. The research group working on gas hydrates at the USGS is among the largest in the US and has expertise in all the major geoscience disciplines, as well as in the physics and chemistry of gas hydrates, the geotechnical properties of hydrate...

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  Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

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  October 15, 2018

  U.S. Geological Survey Gas Hydrates Project

  The USGS Gas Hydrates Project has been making contributions to advance understanding of US and international gas hydrates science for at least three decades. The research group working on gas hydrates at the USGS is among the largest in the US and has expertise in all the major geoscience disciplines, as well as in the physics and chemistry of gas hydrates, the geotechnical properties of hydrate...

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  September 18, 2018

  The Mid-Atlantic Resource Imaging Experiment (MATRIX)

  In late August 2018, scientists and technical staff from the USGS Coastal and Marine Hazards and Resources Program completed the acquisition of over 2000 km of multichannel seismic (MCS) data as part of the Mid-Atlantic Resource Imaging Experiment (MATRIX) conducted aboard the R/V Hugh R. Sharp. The seismic program was led by the USGS Gas Hydrates Project and was sponsored by the USGS, the U.S...

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  Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

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  September 18, 2018

  The Mid-Atlantic Resource Imaging Experiment (MATRIX)

  In late August 2018, scientists and technical staff from the USGS Coastal and Marine Hazards and Resources Program completed the acquisition of over 2000 km of multichannel seismic (MCS) data as part of the Mid-Atlantic Resource Imaging Experiment (MATRIX) conducted aboard the R/V Hugh R. Sharp. The seismic program was led by the USGS Gas Hydrates Project and was sponsored by the USGS, the U.S...

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  August 27, 2018

  IMMeRSS-- Geophysical Imaging for Methane Seep Studies

  Geophysical imaging relies on specialized tools to detect anomalies in the water column or to map features on or beneath the seafloor. Equipment may be towed, mounted on the side of a ship, or attached to the ship’s hull. Many geophysical techniques rely on transmitting an acoustic signal of a particular frequency and analyzing the information in the returning signal to infer the properties of the...

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  Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

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  August 27, 2018

  IMMeRSS-- Geophysical Imaging for Methane Seep Studies

  Geophysical imaging relies on specialized tools to detect anomalies in the water column or to map features on or beneath the seafloor. Equipment may be towed, mounted on the side of a ship, or attached to the ship’s hull. Many geophysical techniques rely on transmitting an acoustic signal of a particular frequency and analyzing the information in the returning signal to infer the properties of the...

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  August 27, 2018

  IMMeRSS-- Interagency Mission for Methane Research on Seafloor Seeps

  From May 3 to May 11, 2017, the U.S. Geological Survey, in collaboration with the British Geological Survey and with support from these two agencies, the National Oceanic and Atmospheric Administration (NOAA) Office of Ocean Exploration and Research, and the U.S. Department of Energy, will lead an expedition aboard the R/V Hugh R. Sharp to explore seafloor methane seeps on the northern U.S...

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  Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

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  August 27, 2018

  IMMeRSS-- Interagency Mission for Methane Research on Seafloor Seeps

  From May 3 to May 11, 2017, the U.S. Geological Survey, in collaboration with the British Geological Survey and with support from these two agencies, the National Oceanic and Atmospheric Administration (NOAA) Office of Ocean Exploration and Research, and the U.S. Department of Energy, will lead an expedition aboard the R/V Hugh R. Sharp to explore seafloor methane seeps on the northern U.S...

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  August 23, 2018

  Gas Hydrates- Atlantic Margin Methane Seeps

  Analysis of 94,000 square kilometers of multibeam water column backscatter data collected by the NOAA Okeanos Explorer mostly seaward of the shelf-break on the northern US Atlantic margin reveals more than 570 gas plumes that correspond to seafloor methane seeps. This discovery is documented in an August 2014 Nature Geoscience paper entitled, "Widespread methane leakage from the seafloor on the...

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  Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

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  August 23, 2018

  Gas Hydrates- Atlantic Margin Methane Seeps

  Analysis of 94,000 square kilometers of multibeam water column backscatter data collected by the NOAA Okeanos Explorer mostly seaward of the shelf-break on the northern US Atlantic margin reveals more than 570 gas plumes that correspond to seafloor methane seeps. This discovery is documented in an August 2014 Nature Geoscience paper entitled, "Widespread methane leakage from the seafloor on the...

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  May 2, 2018

  Environmental Compliance

  The National Environmental Policy Act of 1969 (NEPA) is the cornerstone of our Nation's environmental laws and was enacted to ensure that information on the environmental impacts of any Federal, or federally funded, action is available to public officials and citizens before decisions are made and before actions are taken

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  Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

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  May 2, 2018

  Environmental Compliance

  The National Environmental Policy Act of 1969 (NEPA) is the cornerstone of our Nation's environmental laws and was enacted to ensure that information on the environmental impacts of any Federal, or federally funded, action is available to public officials and citizens before decisions are made and before actions are taken

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  March 13, 2023

  Global compilation of published gas hydrate-related bottom simulating reflections

  Bottom simulating reflections (BSRs) are seismic features that are imaged in marine sediments using high-energy, impulsive seismic sources such as air guns or generator-injector guns. BSRs often cut across sediment stratigraphy and are interpreted as marking the deepest depth at which gas hydrate can exist. Gas hydrate is a naturally occurring and widely distributed frozen form of water and gas (u

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  Woods Hole Coastal and Marine Science Center

  January 15, 2021

  Split-beam Echo Sounder and Navigation Data Collected Using a Simrad EK80 Wide Band Tranceiver and ES38-10 Transducer During the Mid-Atlantic Resource Imaging Experiment (MATRIX), USGS Field Activity 2018-002-FA.

  In summer 2018, the U.S. Geological Survey partnered with the U.S Department of Energy and the Bureau of Ocean Energy Management to conduct the Mid-Atlantic Resources Imaging Experiment (MATRIX) as part of the U.S. Geological Survey Gas Hydrates Project. The field program objectives were to acquire high-resolution 2-dimensional multichannel seismic-reflection and split-beam echosounder data along

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  Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

  September 9, 2020

  Multichannel Seismic-Reflection and Navigation Data Collected Using Sercel GI Guns and Geometrics GeoEel Digital Streamers During the Mid-Atlantic Resource Imaging Experiment (MATRIX), USGS Field Activity 2018-002-FA

  In summer 2018, the U.S. Geological Survey partnered with the U.S Department of Energy and the Bureau of Ocean Energy Management to conduct the Mid-Atlantic Resources Imaging Experiment (MATRIX) as part of the U.S. Geological Survey Gas Hydrates Project. The field program objectives were to acquire high-resolution 2-dimensional multichannel seismic-reflection and split-beam echosounder data along

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  Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

  June 12, 2020

  Preliminary global database of known and inferred gas hydrate locations

  For more than 25 years, the U.S. Geological Survey Gas Hydrates Project has compiled and maintained an internal database of locations where the existence of gas hydrate has been confirmed or inferred in research studies. The existence of gas hydrate was considered confirmed when gas hydrate was recovered by researchers or videotaped from a vehicle (such as a submersible or remotely operated vehicl

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  Woods Hole Coastal and Marine Science Center

  April 9, 2020

  Marine Geophysical Data Collected to Support Methane Seep Research Along the U.S. Atlantic Continental Shelf Break and Upper Continental Slope Between the Baltimore and Keller Canyons During U.S. Geological Survey Field Activities 2017-001-FA and 2017-002

  In spring and summer 2017, the U.S. Geological Survey's Gas Hydrates Project conducted two cruises aboard the research vessel Hugh R. Sharp to explore the geology, chemistry, ecology, physics, and oceanography of sea-floor methane seeps and water column gas plumes on the northern U.S. Atlantic margin between the Baltimore and Keller Canyons. Split-beam and multibeam echo sounders and a chirp subbo

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  Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

  July 12, 2019

  Thermal Data and Navigation for T-3 (Fletcher's) Ice Island Arctic Ocean Heat Flow Studies, 1963-73 (ver. 1.1 December 2022)

  The T-3 (Fletcher's) Ice Island in the Arctic Ocean was the site of a scientific research station re-established by the Naval Arctic Research Laboratory starting in 1962. Starting in 1963, the USGS acquired marine heat flow data and coincident sediment cores at sites in Canada Basin, Nautilus Basin, Mendeleev Ridge, and Alpha Ridge as the ice island drifted in the Amerasian Basin. At least 584 hea

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  Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

  July 12, 2019

  Post-expedition report for USGS T-3 Ice Island heat flow measurements in the High Arctic Ocean, 1963-1973

  In February 1963, the U.S. Geological Survey (USGS) began a study of heat flow in the Arctic Ocean Basin and acquired data at 356 sites in Canada Basin and Nautilus Basin and on Alpha-Mendeleev Ridge by the end of the project in 1973. The USGS heat flow and associated piston coring operations were conducted from a scientific station on the freely drifting T-3 Ice island (also known as Fletcher's

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  Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

  May 21, 2019

  Stable isotopic insights into Bathymodiolus childressi at two seeps in the US Atlantic margin, data release

  Chemosynthetic environments support distinct benthic communities capable of utilizing reduced chemical compounds for nutrition. Hundreds of methane seeps have been documented along the U.S. Atlantic margin (USAM), and detailed investigations at a few seeps have revealed distinct environments containing mussels, microbial mats, authigenic carbonates, and soft sediments. The dominant mussel Bathymod

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  Wetland and Aquatic Research Center

  March 22, 2019

  Minimal offshore extent of ice-bearing (subsea) permafrost on the U.S. Beaufort Sea margin

  The present-day distribution of subsea permafrost beneath high-latitude continental shelves has implications for sea level rise and climate change since the Last Glacial Maximum (~20,000 years ago). Because permafrost can be spatially associated with gas hydrate (which may be thermodynamically stable within the several hundred meters above and below the base of permafrost), the contemporary distri

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  Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

  March 29, 2017

  Data and calculations to support the study of the sea-air flux of methane and carbon dioxide on the West Spitsbergen margin in June 2014

  A critical question for assessing global greenhouse gas budgets is how much of the methane that escapes from seafloor cold seep sites to the overlying water column eventually crosses the sea-air interface and reaches the atmosphere. The issue is particularly important in Arctic Ocean waters since rapid warming there increases the likelihood that gas hydrate--an ice-like form of methane and water s

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  Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center
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• Publications
  Filter Total Items: 64

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  Year20232022202120202019201820172016201520142013201220112010200920082007200620052004200320022001200019991998199719961995

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  October 17, 2022

  Negligible atmospheric release of methane from decomposing hydrates in mid-latitude oceans

  Naturally occurring gas hydrates may contribute to a positive feedback for global warming because they sequester large amounts of the potent greenhouse gas methane in ice-like deposits that could be destabilized by increasing ocean/atmospheric temperatures. Most hydrates occur within marine sediments; gas liberated during the decomposition of seafloor hydrates or originating with other methane poo

  Authors

  DongJoo Joung, Carolyn D. Ruppel, John R. Southon, Thomas Weber, John D. Kessler

  By

  Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

  September 27, 2022

  Neural net detection of seismic features related to gas hydrates and free gas accumulations on the northern U.S. Atlantic margin

  Bottom-simulating reflections (BSRs) that sometimes mark the base of the gas hydrate stability zone in marine sediments are often identified based on the reverse polarity reflections that cut across stratigraphic layering in seismic amplitude data. On the northern U.S. Atlantic margin (USAM) between Cape Hatteras and Hudson Canyon, legacy seismic data have revealed pronounced BSRs south of the dee

  Authors

  Urmi Majumdar, Nathaniel C. Miller, Carolyn D. Ruppel

  By

  Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

  September 19, 2022

  Categorizing active marine acoustic sources based on their potential to affect marine animals

  Marine acoustic sources are widely used for geophysical imaging, oceanographic sensing, and communicating with and tracking objects or robotic vehicles in the water column. Under the U.S. Marine Mammal Protection Act and similar regulations in several other countries, the impact of controlled acoustic sources is assessed based on whether the sound levels received by marine mammals meet the criteri

  Authors

  Carolyn D. Ruppel, T.S. Weber, Erica Staaterman, Stanley Labak, Patrick E. Hart

  By

  Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

  January 14, 2022

  U.S. Atlantic margin gas hydrates

  The minimum distribution of gas hydrates on the U.S. Atlantic margin is from offshore South Carolina northward to the longitude of Shallop Canyon on the southern New England margin. Few wells have logged or sampled the gas hydrate zone on this margin, meaning that the presence of gas hydrates is inferred primarily based on seismic data that reveal bottom simulating reflections, mostly at water dep

  Authors

  Carolyn D. Ruppel, William Shedd, Nathaniel C. Miller, Jared W. Kluesner, Matthew Frye, Deborah Hutchinson

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  Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

  January 1, 2022

  Gas hydrates on Alaskan marine margins

  Gas hydrate distributions on the marine margins of the U.S. state of Alaska are more poorly known than those on other U.S. margins, where bottom simulating reflections have been systematically mapped on marine seismic data to support modern, quantitative assessments of gas-in-place in gas hydrates. The extent of bottom simulating reflections in the U.S. Beaufort Sea has been known since the late 1

  Authors

  Carolyn D. Ruppel, Patrick E. Hart

  By

  Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

  September 21, 2021

  Elevated levels of radiocarbon in methane dissolved in seawater reveal likely local contamination from nuclear powered vessels

  Measurements of the natural radiocarbon content of methane (14C-CH4) dissolved in seawater and freshwater have been used to investigate sources and dynamics of methane. However, during investigations along the Atlantic, Pacific, and Arctic Ocean Margins of the United States, as well as in the North American Great Lakes, some samples revealed highly elevated 14C-CH4 values, as much as 4–5 times abo

  Authors

  D.J. Joung, Carolyn D. Ruppel, J. Southon, John D. Kessler

  By

  Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

  September 1, 2021

  Hydrate formation on marine seep bubbles and the implications for water column methane dissolution

  Methane released from seafloor seeps contributes to a number of benthic, water column, and atmospheric processes. At seafloor seeps within the methane hydrate stability zone, crystalline gas hydrate shells can form on methane bubbles while the bubbles are still in contact with the seafloor or as the bubbles begin ascending through the water column. These shells reduce methane dissolution rates, al

  Authors

  Xiaojing Fu, William F. Waite, Carolyn D. Ruppel

  By

  Woods Hole Coastal and Marine Science Center

  December 23, 2020

  Estimating the impact of seep methane oxidation on ocean pH and dissolved inorganic radiocarbon along the U.S. mid‐Atlantic Bight

  Ongoing ocean warming can release methane (CH4) currently stored in ocean sediments as free gas and gas hydrates. Once dissolved in ocean waters, this CH4 can be oxidized to carbon dioxide (CO2). While it has been hypothesized that the CO2 produced from aerobic CH4 oxidation could enhance ocean acidification, a previous study conducted in Hudson Canyon shows that CH4 oxidation has a small short‐te

  Authors

  Fenix Garcia-Tigreros, Mihai Leonte, Carolyn D. Ruppel, Angel Ruiz-Angulo, DoongJoo Joung, Benjamin Young, John D. Kessler

  By

  Woods Hole Coastal and Marine Science Center

  June 22, 2020

  Gas hydrates in sustainable chemistry

  Gas hydrates have received considerable attention due to their important role in flow assurance for the oil and gas industry, their extensive natural occurrence on Earth and extraterrestrial planets, and their significant applications in sustainable technologies including but not limited to gas and energy storage, gas separation, and water desalination. Given not only their inherent structural fle

  Authors

  Aliakbar Hassanpouryouzband, Edris Joonaki, Mehrdad Vasheghani Farahania, Satoshi Takeya, Carolyn D. Ruppel, Jinhai Yang, Neill English, Judith Schicks, Katriona Edlmann, Hadi Mehrabian, Bahman Tohidi

  By

  Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

  June 4, 2020

  Timescales and processes of methane hydrate formation and breakdown, with application to geologic systems

  Gas hydrate is an ice-like form of water and low molecular weight gas stable at temperatures of roughly -10ºC to 25ºC and pressures of ~3 to 30 MPa in geologic systems. Natural gas hydrates sequester an estimated one-sixth of Earth’s methane and are found primarily in deepwater marine sediments on continental margins, but also in permafrost areas and under continental ice sheets. When gas hydrate

  Authors

  Carolyn D. Ruppel, William F. Waite

  By

  Woods Hole Coastal and Marine Science Center

  April 4, 2020

  Surface methane concentrations along the mid-Atlantic bight driven by aerobic subsurface production rather than seafloor gas seeps

  Relatively minor amounts of methane, a potent greenhouse gas, are currently emitted from the oceans to the atmosphere, but such methane emissions have been hypothesized to increase as oceans warm. Here, we investigate the source, distribution, and fate of methane released from the upper continental slope of the U.S. Mid-Atlantic Bight, where hundreds of gas seeps have been discovered between the

  Authors

  Mihai Leonte, Carolyn D. Ruppel, Angel Ruiz-Angelo, John D. Kessler

  By

  Woods Hole Coastal and Marine Science Center

  March 31, 2020

  Cascadia Margin cold seeps: Subduction zone fluids, gas hydrates, and chemosynthetic habitats

  Priority Geographic Area: The outer continental shelf and upper continental slope from Canada/U.S. border offshore Washington State to the Mendocino Fracture Zone (Northern California), entirely within the U.S. Exclusive Economic Zone (EEZ), from the outermost shelf to at least 2000 m water depth (Figure 1). Description of Priority Area: Since 2015, over a thousand water column gas plumes originat

  Authors

  Amanda Demopoulos, Carolyn D. Ruppel, Nancy G. Prouty, Janet Watt, Tamara Baumberger, David A Butterfield

  By

  Ecosystems Mission Area, Wetland and Aquatic Research Center

  Non-USGS Publications**

  Tréhu, A.M., C. Ruppel, M. Holland, G.R. Dickens, M.E. Torres, T.S. Collett, D. Goldberg, M. Riedel, and P. Schultheiss. 2006. Gas hydrates in marine sediments: Lessons from scientific ocean drilling. Oceanography 19(4):124–142, https://doi.org/10.5670/oceanog.2006.11.

  Nimblett, J. and C. Ruppel, 2003, Permeability evolution during formation of gas hydrates in marine sediments, Journal of Geophysical Research, 108, 2420, doi: 10.1029/2001JB001650.

  Ruppel, C., Thermal state of the gas hydrate reservoir, 2000, in: Max, M. editor, Natural Gas Hydrate in Oceanic and Permafrost Environments, Kluwer Academic Publishers, 29-42, 2000. https://doi.org/10.1007/978-94-011-4387-5_4

  Nimblett, J. and C. Ruppel, 2003, Permeability evolution during formation of gas hydrates in marine sediments, Journal of Geophysical Research, 108, 2420, doi: 10.1029/2001JB001650.

  Ruppel, C., 1997, Anomalously cold temperatures observed at the base of the gas hydrate stability zone, U.S. Atlantic passive margin, Geology, 25, 699-702. Doi: 10.1130/0091-7613(1997)025<0699:ACTOAT>2.3.CO;2

  Wood, W.T., and Ruppel, C., 2000. Seismic and thermal investigations of the Blake Ridge gas hydrate area: a synthesis. In Paull, C.K., Matsumoto, R., Wallace, P.J., and Dillon, W.P. (Eds.), Proc. ODP, Sci. Results, 164: College Station, TX (Ocean Drilling Program), 253–264. doi:10.2973/odp.proc.sr.164.203.2000

  Xu, W. and C. Ruppel, 1999, Predicting the occurrence, distribution, and evolution of methane gas hydrate in porous marine sediments from analytical models, Journal of Geophysical Research, 104, ,5081-5096. 10.1029/1998JB900092

  Paull, C.K., Matsumoto, R., Wallace, P.J., et al., 1996. Proc. ODP, Init. Repts., 164: College Station, TX (Ocean Drilling Program). doi:10.2973/odp.proc.ir.164.1996

  Ruppel, C., R.P. Von Herzen, and A. Bonneville, 1995, Heat flux through an old (~175 Ma) passive margin: offshore southeastern USA, Journal of Geophysical Research, 100,20,037-20,058. Doi: 10.1029/95JB01860

  Santamarina, J.C. and C. Ruppel, 2010, The impact of hydrate saturation on the mechanical, electrical, and thermal properties of hydrate-bearing sand, silts, and clay (Chapter 26), In: Riedel, Willoughby, Chopra (eds), Geophysical Characterization of Gas Hydrates, Society of Exploration Geophysicists Geophysical Developments, vol. 14, 373-384

  Trehu, A.M., C. Ruppel, J. Dickens, D. Goldberg, M. Holland, M. Riedel, P. Schultheiss, and M. Torres, 2006, Gas hydrates in marine sediments: lessons from ocean drilling, Oceanography, 19, 124-143, 2006.

  Yun, T.S., G. Narsilio, J.C. Santamarina, and C. Ruppel, 2006, Instrumented pressure testing chamber for characterizing sediment cores recovered at in situ hydrostatic pressure, Marine Geology, 229, 285-293. doi: 10.1016/j.margeo.2006.03.012.

  Yun, T.S., F. Francisca, J.C. Santamarina, and C. Ruppel, 2005, Compressional and shear wave velocities of uncemented sediment containing gas hydrate, Geophysical Research Letters, 32, L10609. doi: 10.1029/2005GL022607.

  Nimblett, J. and C. Ruppel, 2003, Permeability evolution during formation of gas hydrates in marine sediments, Journal of Geophysical Research, 108, 2420, doi: 10.1029/2001JB001650.

  Waite, W.F, deMartin, B.J, Kirby, S.H., Pinkston, J., Ruppel, C.D., 2002, Thermal conductivity measurements in porous mixtures of methane hydrate and quartz sand, Geophysical Research Letters. doi: 10.1029/2002GL015988

  Ruppel C. (2000) Thermal State of the Gas Hydrate Reservoir. In: Max M.D. (eds) Natural Gas Hydrate. Coastal Systems and Continental Margins, vol 5. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4387-5_4

  Xu, W. and C. Ruppel, 1999, Predicting the occurrence, distribution, and evolution of methane gas hydrate in porous marine sediments from analytical models, Journal of Geophysical Research, 104, ,5081-5096

  **Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

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  October 1, 2021

  Gas Hydrate in Nature

  This geonarrative combines the text and imagery of USGS Fact Sheet 3080 with additional supporting imagery. Except for headings used to organize the text in the geonarrative and an updated name for the coastal and marine program at the USGS, the text is exactly the same as USGS Fact Sheet 3080, with an updated timeline diagram.

  By

  Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

  October 1, 2021

  USGS Gas Hydrates Project

  This geonarrative combines the text and imagery of USGS Fact Sheet 3079 with additional supporting imagery. Except for (a) headings used to organize the text in the geonarrative, (b) an additional reference to support an image included in the geonarrative, and (c) the updated program name for the coastal and marine component of the USGS, the text is the same as that of USGS Fact Sheet 3079. 

  By

  Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

  January 3, 2020

  Coastal and Marine Hazards and Resources Program Decadal Science Strategy

  This geonarrative constitutes the Decadal Science Strategy of the U.S. Geological Survey's Coastal and Marine Hazards and Resources Program, for 2020 to 2030.

  By

  Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center
• News
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  January 26, 2022

  USGS scientists contribute to new gas hydrates monograph

  The recently-published monograph entitled World Atlas of Submarine Gas Hydrates on Continental Margins compiles findings about gas hydrates offshore all of Earth’s continents and also onshore in selected permafrost regions.  

  By

  Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Energy Resources Program, Woods Hole Coastal and Marine Science Center

  Filter Total Items: 13

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  Year20232022202120202019201820172016201520142013201220112010200920082007200620052004200320022001200019991998199719961995

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  December 13, 2022

  Woods Hole Gas Hydrates Project Scientists Participate in Alaskan North Slope Drilling Expedition

  Five USGS gas hydrates scientists from the Woods Hole Coastal and Marine Science Center recently returned from more than five weeks spent supporting a...

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  June 22, 2020

  Windows to the Deep 2019 - Exploring Deep Sea Habitats of the Southeastern U.S.

  From May 30 through July 12, 2019, USGS joined NOAA and partners on NOAA Ship Okeanos Explorer to collect critical baseline information about unknown...

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  June 22, 2020

  Seafloor Methane Seeps at the Edge of Hydrate Stability

  In June 2019, USGS scientists led a 22-day deep-sea research expedition aboard the R/V Falkor to examine methane seep dynamics and processes along the...

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  March 30, 2020

  Coastal and Marine Hazards and Resources Program Decadal Science Strategy Published

  This geonarrative constitutes the Decadal Science Strategy of the USGS's Coastal and Marine Hazards and Resources Program for 2020 to 2030.

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  August 27, 2019

  Arctic Ocean Historical Data Rescue

  Measurements collected on Fletcher's Ice Island,  a scientific drift station in the western Arctic Ocean, half a century ago were published for the...

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  August 8, 2019

  Ten Years of Icy Data Show the Flow of Heat from the Arctic Seafloor

  In addition to 10 years of data on the flow of heat in the Arctic ocean seafloor, the USGS and Geological Survey of Canada have published an analysis...

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  February 27, 2019

  The interaction of climate change and methane hydrates is one of the Reviews of Geophysics' top rated articles!

  According to Reviews of Geophysics this work received some of the highest count of citations amongst articles published between January 2017 and...

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  November 1, 2018

  USGS Images Gas Hydrates with 2,000 Kilometers of New Seismic Data on the U.S. Mid-Atlantic Margin

  In August 2018, the USGS Coastal/Marine Hazards and Resources Program (CMHRP) completed the Mid-Atlantic Resource Imaging Experiment (MATRIX), a three...

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  September 20, 2018

  Seismic Research Cruise Provides New Data on U.S. Atlantic Margin Gas Hydrates

  Data acquired by the U.S. Geological Survey on the U.S. Atlantic Margin in August 2018 reveal new information about the distribution of gas hydrates...

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  March 8, 2018

  Modern Perspective on Gas Hydrates

  After lying hidden in sediments for thousands of years, delicate frozen gas structures are in the spotlight for both scientific research and the...

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  May 31, 2017

  Real-Time Public Engagement in Deep-Water Remotely Operated Vehicle Dives at Methane Seeps

  Outreach activities were a critical component of the remotely operated vehicle research cruise during which USGS scientists teamed with collaborators...

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  April 30, 2017

  Subsea Permafrost and Associated Methane Hydrate on the U.S. Arctic Ocean Margin

  A new publication by USGS and BOEM provides the most complete information to date about the seaward extent of remaining subsea permafrost and possible...

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